I am not familiar with the old one. I installed the theme then I installed the recommended plugins then followed the prompt and installed the demo content. When I checked the site I had the apache2 default page. I tried apt-get remove apache2. It got removed or at least it looked like something was getting removed but yet when I pull the domain name the default page would still show. I will try to recreate the same issue when I get home (Im on the road now) and see if I can get it solved and maybe you could see what I am talking about.
The flatsome version is 3.0.28